Please include uptime (HH:MM) in live channel preview thumbnail overlays
Similar to the "LIVE" and viewer count corner overlays ("tw-media-card-image__corners") on live channel preview thumbnails, I believe an uptime counter should show up on hover state, giving the user an idea of how long the stream has been live. Whether it is to discern if your favorite streamer is nearing the end of their broadcast (based on schedule) or for how long they have already been playing the game you were hoping to watch, uptime can play an important role in determining who, how, and when you'll watch. Providing such information without having to click all the way into a stream would be very helpful.

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Ztloc commented
At the moment the info we have for a stream before going directly into watching is; a thumbnail, the stream title, streamer name, category & tags. I would like to also have a stream uptime counter in this section. This would let you know where the stream is up to without going onto the page to find out.
Perhaps adding a small uptime counter on the bottom right of the thumbnail, opposite the viewer count or something along those lines.